Allign Intel macro assemblers with changes to ARM macro assembler.

Removed bogus ASSERTs from Intel macro assemblers.

Added a debug mode generated code assert to allocation code.
Review URL: http://codereview.chromium.org/199044

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2837 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/builtins-ia32.cc

@@ -129,10 +129,6 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // eax: initial map
     __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset));
     __ shl(edi, kPointerSizeLog2);
-    // Make sure that the maximum heap object size will never cause us
-    // problem here, because it is always greater than the maximum
-    // instance size that can be represented in a byte.
-    ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
     __ AllocateObjectInNewSpace(edi,
                                 ebx,
                                 edi,
@@ -193,8 +189,6 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // ebx: JSObject
     // edi: start of next object (will be start of FixedArray)
     // edx: number of elements in properties array
-    ASSERT(Heap::MaxObjectSizeInPagedSpace() >
-           (FixedArray::kHeaderSize + 255*kPointerSize));
     __ AllocateObjectInNewSpace(FixedArray::kHeaderSize,
                                 times_pointer_size,
                                 edx,

src/ia32/macro-assembler-ia32.cc

@@ -631,6 +631,11 @@ void MacroAssembler::LoadAllocationTopHelper(Register result,
   if ((flags & RESULT_CONTAINS_TOP) != 0) {
     // No use of scratch if allocation top is provided.
     ASSERT(scratch.is(no_reg));
+#ifdef DEBUG
+    // Assert that result actually contains top on entry.
+    cmp(result, Operand::StaticVariable(new_space_allocation_top));
+    Check(equal, "Unexpected allocation top");
+#endif
     return;
   }
 

src/ia32/stub-cache-ia32.cc

@@ -1783,9 +1783,6 @@ Object* ConstructStubCompiler::CompileConstructStub(
   // ebx: initial map
   __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
   __ shl(ecx, kPointerSizeLog2);
-  // Make sure that the maximum heap object size will never cause us
-  // problems here.
-  ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
   __ AllocateObjectInNewSpace(ecx,
                               edx,
                               ecx,

src/x64/builtins-x64.cc

@@ -536,10 +536,6 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     __ movzxbq(rdi, FieldOperand(rax, Map::kInstanceSizeOffset));
     __ shl(rdi, Immediate(kPointerSizeLog2));
     // rdi: size of new object
-    // Make sure that the maximum heap object size will never cause us
-    // problem here, because it is always greater than the maximum
-    // instance size that can be represented in a byte.
-    ASSERT(Heap::MaxObjectSizeInPagedSpace() >= (1 << kBitsPerByte));
     __ AllocateObjectInNewSpace(rdi,
                                 rbx,
                                 rdi,
@@ -600,8 +596,6 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // rbx: JSObject
     // rdi: start of next object (will be start of FixedArray)
     // rdx: number of elements in properties array
-    ASSERT(Heap::MaxObjectSizeInPagedSpace() >
-           (FixedArray::kHeaderSize + 255*kPointerSize));
     __ AllocateObjectInNewSpace(FixedArray::kHeaderSize,
                                 times_pointer_size,
                                 rdx,

src/x64/macro-assembler-x64.cc

@@ -1242,6 +1242,12 @@ void MacroAssembler::LoadAllocationTopHelper(Register result,
   if ((flags & RESULT_CONTAINS_TOP) != 0) {
     // No use of scratch if allocation top is provided.
     ASSERT(scratch.is(no_reg));
+#ifdef DEBUG
+    // Assert that result actually contains top on entry.
+    movq(kScratchRegister, new_space_allocation_top);
+    cmpq(result, Operand(kScratchRegister, 0));
+    Check(equal, "Unexpected allocation top");
+#endif
     return;
   }
 

src/x64/stub-cache-x64.cc

@@ -1784,9 +1784,6 @@ Object* ConstructStubCompiler::CompileConstructStub(
   // rbx: initial map
   __ movzxbq(rcx, FieldOperand(rbx, Map::kInstanceSizeOffset));
   __ shl(rcx, Immediate(kPointerSizeLog2));
-  // Make sure that the maximum heap object size will never cause us
-  // problems here.
-  ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
   __ AllocateObjectInNewSpace(rcx,
                               rdx,
                               rcx,